Article
Engineering, Chemical
Azam Aydani, Adele Brunetti, Hafez Maghsoudi, Giuseppe Barbieri
Summary: This paper investigates the impact of different gas mixtures on CO2 separation using an SSZ-13 zeolite membrane, showing good performance at 30 degrees Celsius and 200 kPa pressure, with improved selectivity for various mixed gases. The membrane demonstrated consistent CO2 permeance while reducing the permeance of other gases, leading to increased selectivity across different gas compositions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Azam Aydani, Hafez Maghsoudi, Adele Brunetti, Giuseppe Barbieri
Summary: Intercrystalline defects in zeolite membranes can be significantly reduced by dipping in silica sol solutions with different ethanol/TEOS molar ratios, leading to improved gas selectivity and permeation properties. The post-treatment modification with a specific ethanol/TEOS molar ratio effectively enhances the CO2/CH4 selectivity in SSZ-13 zeolite membranes under mixed gas conditions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Weijie Huang, Zibo He, Bo Liu, Qing Wang, Shenglai Zhong, Rongfei Zhou, Weihong Xing
Summary: Compared with ceramic hollow-fiber and tubular structures, this monolithic support configuration offers superior mechanical strength, high surface-to-volume ratio, and reduced sealing points. Intergrown and thin SSZ-13 membranes with a surface-to-volume ratio of 680 m(2)/m(3) were successfully prepared on the 61-channel monoliths through one-step secondary growth. The membranes exhibited uniform thickness on different channels. A typical membrane with an efficient membrane area of approximately 200 cm(2) achieved an ultrahigh selectivity of CO2/CH4 up to 280, surpassing reported SSZ-13 membranes with smaller areas (less than 20 cm(2)). The effects of temperature and pressure on the separation performance of membranes on the 61-channel monoliths were investigated. Our findings demonstrate that the scalable SSZ-13 membrane on the 61-channel monolith is a promising candidate for natural gas sweetening.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Jiayu Wu, Weijie Huang, Junjing Zhou, Yueyang Xu, Bo Liu, Rongfei Zhou, Weihong Xing
Summary: High-quality tubular SSZ-13 zeolite membranes were successfully fabricated for the first time using a facile in-situ approach. This approach, which only requires a single hydrothermal step, is much simpler than the multi-step secondary-growth approach. The membranes exhibited excellent selectivity and permeance in gas separation, surpassing most reported zeolite membranes.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
He-Li Wang, Mei-Hua Zhu, Ting Wu, Qin-Liang Jiang, Fei Zhang, Ya-Fen Wu, Xiang-Shu Chen
Summary: In this paper, the synthesized SSZ-13 zeolite membrane was treated with heated sodium chloride instead of calcination in air. The surface modification of the membrane by heated NaCl improved the gas separation selectivity.
Article
Engineering, Chemical
Mohd Zamidi Ahmad, Violeta Martin-Gil, Tatana Supinkova, Pierrick Lambert, Roberto Castro-Munoz, Pavel Hrabanek, Milan Kocirik, Vlastimil Fila
Summary: The study investigates a new mixed matrix membrane with SSZ-16 zeolite addition to improve gas separation performance. While higher filler loadings slightly lower permeability, excessively high loadings can lead to a drop in selectivity due to defective polymer-filler interfaces.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Hua Liu, Xuechao Gao, Shengxian Wang, Zhou Hong, Xuerui Wang, Xuehong Gu
Summary: High-silica CHA (SSZ-13) zeolite membranes show great potential for CO2 separation, but practical application is limited by high investment costs. In this study, SSZ-13 zeolite membranes were successfully synthesized on hollow fibers with different pore sizes, achieving good CO2/CH4 selectivity and CO2 permeance on membranes with 150 nm pores. Evaluation of gas permeation found that small molecules mainly pass through zeolitic pores, while larger molecules are more sensitive to non-zeolitic pores.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Azam Aydani, Hafez Maghsoudi
Summary: In this study, a Si-CHA/SSZ-13 bilayer membrane was synthesized and evaluated for CO2/CH4 separation in wet conditions. The results showed that the bilayer membrane exhibited improved resistance to moisture and increased selectivity, while maintaining ion-exchange capability.
Article
Engineering, Chemical
Peipei Zhou, Ting Wu, Zhen Sun, Yinuo Liu, Xinwei Chen, Meihua Zhu, Fei Zhang, Na Hu, Yuqin Li, Tian Gui, Xiangshu Chen, Hidetoshi Kita
Summary: High-silica SSZ-13 membranes were synthesized using different sodium sources, and a pure phase membrane with high gas permeation was obtained using NaCl. The NaCl content influenced the crystal morphology and size, but had little effect on the membrane structure. The optimal membrane exhibited excellent gas permeance and selectivity, as well as hydrothermal stability in a humid environment.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Inorganic & Nuclear
Xiang Liao, Bing Wang, Ruiqi Yin, Weiguo Ren, Jing Li, Haotian Gan, Peng Lv, Weiren Bao, Jiancheng Wang, Liping Chang, Zhanggen Huang, Lina Han
Summary: Interzeolite transformation (IZT) was used to synthesize zeolite SSZ-13 with novel structure and composition. The effects of synthesis parameters on the crystallization of zeolite SSZ-13 were investigated. It was found that a feeding H2O/SiO2 ratio of 17.5-25, OH-/SiO2 ratio of 0.2-0.6, and Al2O3/SiO2 ratio of 30-40 resulted in zeolite SSZ-13 with high crystallinity and regular pore structure. Excessive water and high concentrations of OH- ions had negative effects on the synthesis of zeolite SSZ-13.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Engineering, Chemical
Yanmei Li, Yulei Wang, Mingyang Guo, Bo Liu, Rongfei Zhou, Zhiping Lai
Summary: This study successfully synthesized continuous SSZ-13 zeolite membranes on the inner surface of monolith supports for the first time, with higher packing density and mechanical strength. Inserting spacers was an effective way to reduce the negative impact of concentration polarization and improve separation performance of the membranes. Adding spacers significantly increased carbon dioxide permeance and CO2/CH4 selectivity under the same feed flow rate.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Multidisciplinary Sciences
Yulong Shan, Guangzhi He, Jinpeng Du, Yu Sun, Zhongqi Liu, Yu Fu, Fudong Liu, Xiaoyan Shi, Yunbo Yu, Hong He
Summary: This study demonstrates that the inhibition of Cu-SSZ-13 zeolite catalysts in the presence of NO2 is due to the strong oxidation leading to the formation of Cu-II species with low mobility. This distinctive behavior is explained by the higher energy barrier of the SCR reaction occurring at the Cu-II sites compared to the standard SCR reaction on dynamic binuclear sites.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Applied
Viktoria Babic, Siddardha Koneti, Simona Moldovan, Nikolai Nesterenko, Jean-Pierre Gilson, Valentin Valtchev
Summary: NH4-SSZ-13 zeolite is etched using an aqueous solution of 40% NH4F under different time/temperature conditions to obtain hierarchical derivatives. The zeolites exhibit sensitivity to high temperature and high liquid-solid ratio treatments, which can lead to significant crystallinity losses. Careful tuning of these parameters is necessary to retain important characteristics in the hierarchical derivatives. The catalytic activity of the modified SSZ-13 is evaluated in n-propanol conversion.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Runlin Han, Yuxuan Tao, Liang Zhou
Summary: By introducing aluminum nitrate and fluoride ions under unconventional synthesis conditions, SSZ-13 zeolite with excellent catalytic and adsorption performance was prepared, showing the advantage of a multistage pore structure.
Article
Chemistry, Physical
Hwangho Lee, Inhak Song, Se Won Jeon, Do Heui Kim
Summary: The study aims to reveal the mobility-dependent SCR reaction by controlling Cu species with different ion mobilities in Cu-SSZ-13. The results indicate that enhanced ion mobility leads to improved NH3-SCR activity, providing insights for designing rational catalysts by tuning ion mobility.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Engineering, Chemical
Xiaoxue Tang, Ye Zhang, Danni Meng, Xue Kong, Lin Kong, Heng'e Qiu, Ning Xu, Wanying Guo, Senlin Yang, Yanfeng Zhang
Summary: This study systematically investigated the effects of various parameters on the gel-less synthesis of SSZ-13 membranes for the first time. The key to successful gel-less synthesis is to create an environment similar to conventional hydrothermal synthesis and maintain a delicate balance between the template solution in the seed layer and at the bottom of the autoclave.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Applied
Xue Kong, Heng'e Qiu, Ye Zhang, Xiaoxue Tang, Danni Meng, Senlin Yang, Wanying Guo, Ning Xu, Lin Kong, Yanfeng Zhang, Zefang Zhang
Summary: The synthesis of all-silica CHA zeolite in diluted mother liquor with a H2O/SiO2 ratio of 30 was successfully achieved by using ammonium hexafluorosilicate as the silica source. This method allows for the preparation of pure phase all-silica CHA with a size between 0.3-2 µm in a broad temperature range (373-433 K) with a low TMAdaOH/SiO2 ratio of 0.3. This simplified synthesis method not only facilitates the production of CHA zeolites, but also enables their applications as sorbents and membranes.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Engineering, Chemical
Danni Meng, Xue Kong, Xiaoxue Tang, Wanying Guo, Senlin Yang, Ye Zhang, Heng'e Qiu, Yanfeng Zhang, Zefang Zhang
Summary: Controlling seed size effectively reduces the cost of zeolite membranes and improves CO2 permeance, resulting in thinner membranes. Ball-milling regular SAPO-34 crystals can easily generate ultra-small seed particles, aiding in reducing membrane thickness.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Xue Kong, Heng'e Qiu, Danni Meng, Xiaoxue Tang, Senlin Yang, Wanying Guo, Ye Zhang, Lin Kong, Yanfeng Zhang, Zefang Zhang
Summary: This study developed a new method for the synthesis of all-silica CHA membranes, which not only reduced material costs but also improved membrane performance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Haiyang Yu, Xiaoxue Tang, Xue Kong, Xing'ai Li, Yanpei Li, Mengfei Xi, Tongtong Chang, Danni Meng, Senlin Yang, Wanying Guo, Yanfeng Zhang, Zefang Zhang, Pinhua Rao
Summary: The chemical mechanical polishing of sapphire with different orientations shows varied MRR selectivity, which can be optimized with different abrasives. By preparing novel nanocomposite particles, the combination of mechanical and chemical effects can enhance the MRR of A-plane sapphire.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Shuhong Li, Fan Yang, Kailing Xiang, Jiacheng Chen, Ye Zhang, Jincheng Wang, Jibo Sun, Yuan Li
Summary: A multifunctional microspheric soil conditioner based on chitosan-grafted poly(acrylamide-co-acrylic acid)/biochar (CS-g-P(AM-co-AA)/BC) was successfully prepared. The microspheres exhibited excellent water absorption and retention capabilities, and enhanced adsorption performance for heavy metal ions, making them promising for soil improvement and agricultural production.
Article
Materials Science, Multidisciplinary
Xing'ai Li, Mengfei Xi, Wei Guo, Gui Xu, Wenrui Luo, Qinqi Zhu, Yanpei Li, Haiyang Yu, Tongtong Chang, Yanfeng Zhang, Zefang Zhang, Tao Sun
Summary: The study investigates the chemical mechanical polishing of stainless steel and proposes a two-step polishing process to balance material removal and surface quality. By adjusting pH and adding H2O2, a higher material removal rate and better surface quality can be achieved.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Shuhong Li, Fan Yang, Ye Zhang, Kailing Xiang, Jiacheng Chen, Weisen Dai, Jincheng Wang, Yuan Li
Summary: This research developed a carbon nanotubes/polydopamine/ZSM-5 composite soil conditioner to address soil pollution. The composite conditioner exhibited superior sustained release and adsorption capabilities for fulvic acid and methylene blue compared to traditional materials. Additionally, it demonstrated the ability to promote plant growth.
Article
Chemistry, Physical
Shuhong Li, Ye Zhang, Kailing Xiang, Jiacheng Chen, Jincheng Wang
Summary: A novel type of multifunctional soil conditioner based on 4-arm star-shaped polymer modified mesoporous MCM-41 was designed and used as a carrier for urea and a scavenger for noxious chemicals. The experimental results showed that the modified MCM-41 significantly improved urea release effect and promoted crop growth, while exhibiting good adsorption properties for methylene blue. Moreover, the modified MCM-41 showed no biological toxicity and had good biocompatibility, making it potentially valuable for improving soil environment and promoting crop growth in agricultural applications.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Engineering, Chemical
Mengya Chen, Wanying Guo, Xue Kong, Xiaoxue Tang, Senlin Yang, Danni Meng, Longfei Zhou, Jialin Ma, Xinrui Du, Yanfeng Zhang
Summary: To bring zeolite membranes to commercial application, the issues of low permeance, poor reproducibility, high manufacturing cost and scale-up need to be addressed. This study achieved facile and efficient preparation of pure silica CHA membrane by using an active silica source, ammonium hexafluorosilicate, in a homogeneous mother liquor. The replacement of conventional imhomogeneous slurry-like mother liquor with a homogeneous mother liquor greatly improved the reproducibility of membrane synthesis and favored the formation of thin membrane. The gel-less synthesis reduced material waste without sacrificing selectivity and permeance, resulting in a facile and reproducible preparation method for thin pure silica CHA membrane with high material efficiency.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Yanpei Li, Mengfei Xi, Bowen Jiang, Xing'ai Li, Yanfeng Zhang, Zefang Zhang
Summary: The effects of pH and H2O2 concentration on the CMP of 6063 aluminum alloy were studied in this research. Better CMP performance was achieved in basic media with 1.0 wt% H2O2. Additionally, the structure-performance relationship of complexing agents with different structures and functional groups for the CMP of Al-alloy were systematically studied, indicating that complexing power, steric hindrance, and electrostatic repulsion of complexing agents play important roles in material removal rate and surface roughness.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Chemical
Jiawei Hou, Shixuan Guo, Nigel Graham, Wenzheng Yu, Kening Sun, Ting Liu
Summary: A novel 2D composite membrane based on r-HGO and MXene materials was developed, demonstrating exceptional performance for water treatment in terms of permeability, pollutant rejection, and physical stability. The optimization of preparation conditions and material proportions can result in high water flux and efficient removal of pollutants.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Retraction
Engineering, Chemical
Chang Liu, Jinghong Liu, Liang Zhu, Shanfu Tang, Huixin Xiong
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Rui Gao, Caihong Liu, Andreia F. Faria, Qiang He, Chun Yang, Jun Ma
Summary: A novel copolymer architecture has been developed to address biofouling concerns in thin-film composite (TFC) membranes by integrating anti-fouling, bactericidal, and fouling-release functions. The multifunctional membrane demonstrates promising anti-adhesive properties, self-cleaning ability, and high flux recovery rate.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Alexander T. Bridge, Noah P. Wamble, Matthew S. Santoso, Joan F. Brennecke, Benny D. Freeman
Summary: This study demonstrates the reproducible preparation of high-flux defect-free asymmetric gas separation membranes using Cyrene(TM) as a majority dope formulation component. By adjusting the volume ratios of Cyrene(TM) and THF, as well as the concentrations of Matrimid(R) and the dry step time, optimal membrane performance is achieved.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Alessandra Imbrogno, Han Ya Lin, Babak Minofar, Andrea Iris Schaefer
Summary: In this study, a composite nanofiber membrane containing cross-linked beta-cyclodextrin-epichlorohydrin was prepared and evaluated for the removal of steroid hormones. The results showed that the membrane had high adsorption capacity and the ability to form a specific inclusion complex interaction with the hormones, indicating its potential application in hormone removal.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Bora Shin, Jaewon Shin, Yanuar Chandra Wirasembada, Ki Young Park, Jinwoo Cho
Summary: This study develops a mathematical model to estimate the initial flux of volatile fatty acids in the direct contact membrane distillation process. It identifies the parameters affecting the flux and their relationship with pH.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Yi-Jui Yeh, Jr Rong Liou, Wei Lin, Kuo-Lun Tung, Wei-Hung Chiang
Summary: This study demonstrates an effective plasma engineering method to create nitrogen-doped graphene quantum dot (NGQD)-inorganic nanocomposites for tunable molecular separation. The composite materials show high separation efficiency and controllable nanopore structures, making them potentially valuable for various applications.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Horacio Lopez-Marques, Kristofer L. Gleason, Manuel Aguilar-Vega, Rita Sulub-Sulub, J. Ehren Eichler, Hyeonji Oh, C. Buddie Mullins, Benny D. Freeman, Manish Kumar
Summary: In this study, water transport properties in Carbon Molecular Sieve (CMS) membranes were investigated. It was found that membranes synthesized at different pyrolysis temperatures exhibited varying water permeabilities. Compared to other polymeric materials, CMS membranes showed high water permeability, indicating potential for dehydration applications.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Dmitry A. Alentiev, Roman Yu. Nikiforov, Marina A. Rudakova, Danil P. Zarezin, Maxim A. Topchiy, Andrey F. Asachenko, Nikolay A. Belov, Maxim Bermeshev
Summary: A series of new norbornene-type monomers containing linear and branched substituents were synthesized, and robust thin membranes were prepared by vinyl-addition polymerization. Gas separation performance for the synthesized polymers was evaluated, and the structure of substituent side chains was found to significantly affect gas permeability and CO2 facilitated transport.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Lei Yan, Qi Zhang, Ze Zhang, Gui-Jie Li, Yi Jin, Xin-Lin Zhang, Yan-Yun Sun
Summary: In this study, a continuous, stable and fast ion transport channel was established through in-situ guided cross-linking of zinc alginate hydrogels on a porous membrane, overcoming the negative pore effect and effectively inhibiting the dendrite growth of zinc anodes and interfacial side reactions.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Yuqing Zhang, Ailing Zhang, Huiyang He, Yuting Fan, Yongjiang Li, Song Wang, Sanxi Li
Summary: The Langmuir-Blodgett self-assembly process is used to create an ordered SPEEK membrane, which enhances the proton conductivity by three times compared to conventional solution casting method.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Hasan Ismaeel, David Gibson, Eleonora Ricci, Maria Grazia De Angelis
Summary: In this study, a machine learning-based group contribution method (ML-GC) was developed to predict pure polymer parameters and successfully applied to predict gas solubility and gas solubility isotherms in glassy polymeric membranes. The model showed satisfactory performance on a small dataset, but has the potential to provide more accurate predictions for a wider range of polymers as more data becomes available.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Yi Ji, Yu Sun, Huilin Li, Qiang Fu, Yan Zhang
Summary: Previous studies have shown that vibration- or rotation-based techniques can effectively mitigate fouling during membrane filtration. However, it is difficult to incorporate these techniques with spiral wound modules (SWMs) widely used in water and wastewater treatment. This study developed a prototype membrane system to accommodate angular vibrations with a modified SWM, and experimental results showed that applying angular vibrations can effectively control algal fouling in an SWM with lower energy consumption compared to traditional methods.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Lakshmeesha Upadhayaya, Abaynesh Yihdego Gebreyohannes, Muhammad Wakil Shahzad, Usman T. Syed, Sandra L. Aristizabal, Radoslaw Gorecki, Suzana P. Nunes
Summary: Increasing temperatures worldwide pose a significant health risk, exacerbated by high humidity. Conventional air conditioners contribute heavily to carbon dioxide emissions, with dehumidification being a major factor. Membrane-based dehumidification system offers energy efficiency and non-toxic water vapor removal. This study demonstrates a membrane dehumidification system with polymeric hollow fibers coated with a green polyphenol coating, showing remarkable water vapor transport rate and selectivity. Long-term testing reveals minimal decline in vapor transport and a 4-5 times higher coefficient of performance (COP) compared to conventional dehumidifiers, making it a highly competitive, energy-saving device with reduced emissions and a smaller footprint.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Zhengzhong Zhou, Xue Zhu, Yi Yuan, Shaoqiang Wang, Xiaoshan Meng, Taoli Huhe, Qian Wang
Summary: In this study, lignin, a biomass material, was chemically modified and utilized in the interfacial polymerization process to improve the performance of nanofiltration membranes. The modified membranes showed enhanced hydrophilicity and anti-fouling properties, and the optimization of membrane pore size increased permeability. The study also demonstrated the potential application of the membranes in biogas slurry valorization.
JOURNAL OF MEMBRANE SCIENCE
(2024)